Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Indoor Channels"”.
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Adaptive Equalization for Indoor Channels
… for both stationary and mobile radio channels is considered. Stationary channels are modeled with a simple exponentially decaying profile. The mobile radio channel is represented using a two-ray Rayleigh fading model for an outdoor environment. The SIRCIM channel modeling tool is used …
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A statistical ultra wideband indoor channel model and the effects of antenna directivity on multipath delay spread and path loss in ultra wideband indoor channels
Ultra-wideband (UWB) indoor frequency domain channel measurements have been performed in the 2 GHz to 6 GHz frequency band using three different transmitter/receiver (Tx/Rx) antenna combination pairs. The effects of antenna directivity on path loss and multipath propagation in the channel were …
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Sistemas integrados de la navegación mediante redes locales inalámbricas
… diffraction when they are propagating through indoor channels, which provides a good isolation and allows using narrow aperture angles, respectively.Both special modulation and spatial diversity techniques are needed to cancel the multipath effects mainly due to wave reflections as the wave is …
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Sub-optimal Ultra-wide Band Receivers
… schemes and the receivers on Gaussian and UWB indoor channels. We compare the performance with optimal receivers. A transmitter receiver system using 0.1us pulses implemented using existing hardware. A packet consisting of 24 bits were transmitted and the received signal could be verified in …
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Indoor wide band radio wave propagation measurements and models at 1.3 ghz and 4.0 ghz
… parameters. On average, line-of-sight indoor channels offer 8 dB of cross-polarization discrimination, whereas obstructed environments offer less than 3 dB. Directional antennas provide a significant reduction in rms delay spread over omni-directional antennas. In line-of-sight …
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Bit error simulation of FSK, BPSK, and pi/4 DQPSK in flat and frequency-selective fading mobile radio channels using two-ray and measurement- based impulse response models
… of digital mobile radio systems in fading channels. The simulation tool generates average bit error rate (BER) and bit-by-bit error patterns with user-specified parameters. The simulation tool can simulate various communication system parameters (i.e. modulation scheme, data rate, signal to …
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Measurements and models of radio frequency impulsive noise inside buildings
… and sources of radio frequency noise in indoor channels. Statistical analyses of the measured data are presented in the form of amplitude probability distributions, pulse duration distributions, pulse spacing distributions, and noise factor distributions. Simple mathematical models of …
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The Impact of Signal Bandwidth on Indoor Wireless Systems in Dense Multipath Environments
… and ultra-wideband (UWB) signaling for use in indoor wireless systems. This interest is in part motivated by the notion that the use of large bandwidth signals makes systems less sensitive to the degrading effects of multipath propagation. By reducing the sensitivity to multipath, more robust …
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Design and verification of SC-FDE/OFDM communication schemes for millimetre-wave wireless system using FPGA technologies
… a 64.8 GHz WPAN capable of achieving a reliable indoor link. Thus, single-carrier with frequency domain equalization (SC-FDE) and orthogonal frequency-division multiplexing (OFDM) communication schemes were designed and implemented to mitigate the multipath fading of the 60 GHz indoor channels. …